CN114412959A - Spatial omnibearing self-locking series thin-walled tube energy absorption system - Google Patents
Spatial omnibearing self-locking series thin-walled tube energy absorption system Download PDFInfo
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- CN114412959A CN114412959A CN202210206979.2A CN202210206979A CN114412959A CN 114412959 A CN114412959 A CN 114412959A CN 202210206979 A CN202210206979 A CN 202210206979A CN 114412959 A CN114412959 A CN 114412959A
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- 230000010485 coping Effects 0.000 abstract description 2
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- 238000006073 displacement reaction Methods 0.000 description 9
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
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Abstract
The invention discloses a spatial omnibearing self-locking series thin-walled tube energy absorption system which is a thin-walled tube structure made of metal materials and is formed by staggering and embedding a plurality of series thin-walled tubes, wherein the cross section of a branch structure of the series thin-walled tube is in a shape of four long strips and an ellipse, and three groups of parallel thin plates are connected in series at equal intervals. According to the invention, through the optimized design of the series thin-walled tubes, the energy absorption system can keep the self-locking of the structural member under the impact action in multiple directions in space, namely, no tube member splashes and the energy absorption is stable, and the defect that the load bearing direction of the traditional self-locking energy absorption system is single is overcome. Compared with the prior art, the invention has the advantages that: the energy absorption system can realize rapid expansion in the three-dimensional direction and is not limited by the structural size of the thin-wall pipe, the appearance size of the energy absorption system can be flexibly adjusted according to actual collision energy and the size of a working face, and the energy absorption system is more favorable for coping with complex working conditions.
Description
Technical Field
The invention relates to the technical field of thin-walled tube energy absorption systems, in particular to a series thin-walled tube energy absorption system with omnibearing self locking in space, which can be applied to transportation such as aerospace, ships, automobiles and the like and protection systems of important facilities needing impact resistance and shock absorption.
Background
In recent years, with the vigorous development of the fields of transportation, engineering construction and the like in China, collision and explosion accidents also frequently occur, and the life safety and property are greatly damaged. Therefore, in order to cope with the emergency collision and explosion accident, it is important to design an energy absorption system having high energy absorption efficiency, good energy absorption stability and convenient assembly and disassembly, and many researchers are currently studying the energy absorption system.
The metal thin-wall pipe is widely applied to the energy absorption device due to the characteristics of light weight, simple processing technology, low cost and the like. Meanwhile, the metal thin-wall pipe has the advantages of small relative density, low rigidity, strong deformation under the impact action and the like, and is widely applied to the fields of collision prevention and impact resistance. However, under the consideration of complex working conditions, the traditional structure can not meet the configuration requirements of the buffer device in the field of large-scale engineering, so that the research on the energy absorption system with the metal thin-wall pipe combined structure, which has better energy absorption performance and simple section structure, has great significance.
The traditional energy absorption device usually uses round pipes, circular rings, square pipes and the like, and has the advantages of simple processing, lower cost and capability of providing longer compression stroke. However, the traditional combined structure can generate lateral splashing under the impact action, not only can cause secondary damage, but also has the defects of unstable energy absorption, low energy absorption efficiency and the like, and cannot play a good safety protection effect. To remedy these drawbacks, the measures commonly adopted in engineering are: firstly, arranging a restraining baffle at the boundary of an energy absorption system to prevent the pipe fitting from splashing laterally; and secondly, arranging mechanical connecting pieces among the pipe fittings or welding the pipe fittings to restrain the transverse displacement of the combined structure. However, the measures all require a long time, and the energy absorption device is assembled, so that the emergency situation is not ideal. In order to overcome the defects of a traditional thin-wall circular tube energy absorption system, a dumbbell-shaped thin-wall tube structure is proposed before, the system can reduce the time and labor cost for disassembly and assembly, the impacted circular tube cannot laterally splash, but the self-locking direction of a tube system is single and cannot cope with complex working conditions. A multi-dimensional self-locking thin-wall ball string energy absorption system is proposed in the past, the defect that the traditional one-way self-locking energy absorption system can only bear load in a single specific direction to keep self-locking is overcome, the three-dimensional expansion degree of the system depends on the size of a thin-wall pipe partial structure, and practical application has limitation.
Therefore, the energy absorption system with good energy absorption stability, high energy absorption efficiency and strong mechanical programming performance is designed, and has important values for improving the material utilization rate, reducing the cost of the protection system, resisting the collision under complex working conditions and reducing the loss of lives and properties.
Disclosure of Invention
In order to solve the problem that the existing thin-walled tube energy absorption system in the background technology is poor in three-dimensional space expansion effect, the invention provides a series thin-walled tube energy absorption system with omnibearing self-locking space.
Embodiments of the invention may be implemented as follows:
the embodiment of the invention provides a space omnibearing self-locking series thin-walled tube energy absorption system which is characterized in that: each series thin-wall pipe substructure is formed by connecting four long-strip elliptical pipes and three groups of parallel thin plates in series, a plurality of series thin-wall pipe substructures are arranged in a staggered mode in a mode that the series thin-wall pipes move back and forth and adjacent thin-wall pipes are spaced at equal intervals, so that the expansion of the system in the Y-axis direction is realized, the second layer is expanded along the X-axis in the same arrangement mode and is vertically lapped on the first layer to complete the lapping of a group of series thin-wall pipes, a plurality of groups of series thin-wall pipes are stacked in a staggered mode to realize the longitudinal expansion of the energy absorption system in the Z-axis direction, and the rest layers form a multi-row and multi-column combined structure in a jogged mode, so that the effect that the adjacent structural parts can be self-locked in the space omnibearing impact process of the combined thin-wall pipe structure is realized.
The thin-wall tube substructure is characterized in that the cross section of the thin-wall tube substructure is formed by connecting four long oval tubes with the same size in series with parallel thin plates at equal intervals, and the width H of each parallel thin plate and the width N of a main tube meet the condition that H is equal to N;
the length W and the width N of the main body of the thin-wall tube substructure meet the condition that W is 3N;
the fillet radius R of the thin-wall pipe substructure and the width N of the main pipe meet the condition that R is 2N;
the axial length L of the thin-wall pipe substructure and the width N of the main body pipe meet the condition that L is equal to N.
Furthermore, in an X-Y axis plane, a plurality of series thin-wall pipe sub-structures are arranged in a staggered mode in a forward-backward mode, the front-back staggered distance of the ends of two adjacent thin-wall pipes is the width of a parallel thin plate and the axial length of a main pipe, namely the staggered distance is H + L, the spacing distance of the two adjacent thin-wall pipes is the width N of the main pipe, the thin-wall pipe sub-structures in the Z axis direction are stacked into a group by the upper layer and the lower layer in a criss-cross mode, and a plurality of groups of staggered stacked embedding modes form a three-dimensional structure, so that the combined structure can be rapidly expanded in the three-dimensional direction and is not limited by the size of the thin-wall pipe sub-structures.
Furthermore, the number of the series thin-walled tubes expanded in the X-Y axis plane is not less than 2n, n is not less than 2, and the number of groups expanded in the Z axis is not less than 2.
Furthermore, the energy absorption system is made of a metal thin-wall tube structure.
The principle of the invention is as follows:
a spatial omnibearing self-locking energy absorption system for series thin-walled tubes is a thin-walled tube structure made of metal materials, and is formed by alternately arranging a plurality of series thin-walled tubes, so that a combined structure can be rapidly expanded in a three-dimensional direction and is not limited by the structural size of the thin-walled tubes; the invention has the beneficial effects that the shape proportion of the series thin-walled tube substructure and the arrangement mode of the energy absorption system enable the adjacent structures to achieve the self-locking effect in the process of space omnibearing impact, and the invention has the following beneficial effects:
1. the energy absorption system of the series thin-walled tube with the omnibearing self-locking space can realize the self-locking of the structural member in the process of bearing the omnibearing impact of the space, namely, a constraint boundary displacement baffle or a connecting piece arranged between adjacent pipe fittings is not needed, and the comprehensive requirements of the safety, economy, applicability and other characteristics of a protection system are met.
2. According to the energy absorption system for the thin-walled tubes in series with the omnibearing self-locking space, disclosed by the invention, the thin-walled tubes in series are arranged in a staggered manner, at equal intervals and in a criss-cross manner in which the thin-walled tubes on the upper layer and the thin-walled tubes on the lower layer are stacked, so that the combined structure can be rapidly expanded in the three-dimensional direction without being limited by the structural size of the thin-walled tubes under the condition of not arranging external or internal connecting accessories, and the coping capability of the protection system in a complex working condition is improved.
3. The invention relates to a series thin-wall tube energy absorption system with omnibearing self-locking space, which consists of a plurality of series thin-wall tube sub-structures, wherein the number of the thin-wall tube sub-structures and the number of layers of the energy absorption system can be flexibly adjusted according to actual collision energy and the size of a working surface, and the energy absorption system has good programmability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of a tandem thin-walled tube segment structure according to the present invention.
FIG. 2 is a cross-sectional view of a tandem thin-walled tube substructure according to the present invention.
FIG. 3 is an assembly view of a series thin-walled tube assembly according to the present invention. .
FIG. 4 is a schematic assembled view of an energy absorption system according to the present invention.
FIG. 5 is a schematic perspective view of an energy absorption system according to the present invention.
FIG. 6 is a schematic view of the energy absorption system in the Z-axis direction load deflection in numerical simulation according to an embodiment of the present invention.
FIG. 7 is a force-displacement curve of an energy absorbing system under load in the Z-axis direction in a numerical simulation according to an embodiment of the present invention.
FIG. 8 is a schematic view of the energy absorption system in the X-axis direction load deflection in the numerical simulation according to the embodiment of the present invention.
FIG. 9 is a schematic diagram of the force-displacement curve of the energy absorbing system under load in the X-axis direction in a numerical simulation according to an embodiment of the present invention.
FIG. 10 is a schematic view of the energy absorption system undergoing a load deflection in the X-Z plane at an included angle of 45 degrees in a numerical simulation according to an embodiment of the present invention.
FIG. 11 is a schematic view of a force-displacement curve of an energy absorbing system under a load in the X-Z plane at an included angle of 45 degrees in a numerical simulation according to an embodiment of the present invention.
In fig. 1: A. a main body pipe A of the series thin-wall pipe branch structure; B. a main body tube B of a serial thin-wall tube branch structure.
In fig. 3: 1. a first series thin walled tube arranged along the Y axis; 2. a second series thin walled tube arranged along the Y axis; 3. a first series thin walled tube arranged along the X-axis; 4. a second series of thin walled tubes arranged along the X-axis.
In fig. 4: 5. the second group of first series thin-walled tubes are distributed along the Y axis; 6. and the third group of the first series thin-walled tubes is distributed along the Y axis.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The invention is described in further detail below with reference to the following figures and examples:
the invention relates to a series thin-wall tube energy absorption system with omnibearing self-locking space, which aims to achieve the expected self-locking effect, the size of a thin-wall tube substructure can be adjusted in a proportional range according to the requirement, as shown in figures 1 and 2, the requirements that the width H of a parallel thin plate and the width N of a main tube in the thin-wall tube substructure meet H & ltN & gt, the length W and the width N of the main tube meet W & lt3N & gt, the radius R of a fillet of the substructure and the width N of the main tube meet R & lt2N & gt, and the axial length L and the width N of the main tube meet L & ltN & gt.
In order to achieve the expected self-locking effect, one group of the series thin-walled tubes is formed by two layers of thin-walled tubes in a staggered stacking and overlapping mode, as shown in fig. 3, the first layer of thin-walled tubes are distributed in an arrangement mode of advancing and retreating at equal intervals along the Y-axis direction, the front and back staggered distance between the ends of the thin-walled tubes 1 and the thin-walled tubes 2 is the width H of a parallel thin plate and the axial length L of a main tube, and the interval distance between the two tubes is the width N of the main tube. The second layer of thin-walled tubes is expanded along the X-axis direction in the same arrangement mode as the first layer, and the parallel thin plates of the thin-walled tubes 3 and 4 are respectively attached to the parallel thin plates of the tubes 2 and 1 in the direction perpendicular to the first layer. The number of the series thin-wall tubes expanded in the X-Y axis plane is not less than 2n, and n is not less than 2.
In order to achieve the effect that the expected energy absorption system can be rapidly expanded in the three-dimensional direction and is not limited by the structural size of a thin-wall pipe, the whole energy absorption system is made of metal materials and is formed by stacking and arranging the materials in a unit of group, and the stacking mode is as follows: along the X axis, the main body pipe A of the second group of thin-walled pipes 5 is placed into the inner groove 1, the main body pipe B of the third group of thin-walled pipes 6 is placed into the inner groove of the second group, and the rest layers are in staggered embedding in such a way, so that the expansion of the energy absorption system in the Z axis direction is realized. The assembly process is shown in figure 4.
In order to deal with emergency under complex working conditions, the energy absorption system can flexibly adjust the appearance size according to the actual collision energy and the size of a working face, and the three-dimensional expansion effect is shown in fig. 5.
The embodiment of the invention discloses a series thin-walled tube energy absorption system with omnibearing self-locking space, which has the energy absorption effect under the load of a plurality of directions in a three-dimensional space through simulation calculation. The energy absorption system is formed by splicing 5 groups of series thin-wall tubes, and the arrangement mode of each group of thin-wall tubes is 4 along an X axis and 4 along a Y axis. The individual substructure parameters are as follows: the length of the long elliptic main pipe is 30mm, the width of the long elliptic main pipe is 10mm, the fillet radius R is 5mm, the distance S between the parallel thin plates is 2mm, and the wall thickness t is 0.5mm inwards; the width H of the parallel thin plates is 10 mm. The energy-absorbing system below sets up one and applies the rigid plate of fixed restraint, and the system top sets up a rigid plate and assists the completion punching press load simulation, and the quality of strikeing the board is 60kg, and H is the height before the energy-absorbing system warp, and U is the loading displacement of strikeing the board, and the loading mode is respectively:
1. the impact plate applies load to the energy absorption system at 12m/s along the Z axis, the deformation graph of the energy absorption system after being subjected to impact is shown in FIG. 6, and the force-displacement curve of the simulated impact test is shown in FIG. 7.
2. The impact plate applies load to the energy absorption system at 10m/s along the X axis, the deformation of the energy absorption system after impact is borne is shown in figure 8, and the force-displacement curve of the simulated impact test is shown in figure 9.
3. The upper plate applies load to the energy absorption system at an included angle of 45 degrees along the X-Z axis plane at 10m/s, the deformation graph of the energy absorption system after bearing impact is shown as 10, and the force-displacement curve of a simulated impact test is shown as 11.
Through finite element simulation test, the energy absorption system of the series thin-walled tube with the omnibearing self-locking space can realize the self-locking effect of the structure under the impact action in a plurality of directions in the space, namely, no pipe fitting splashes, and the energy can be stably absorbed.
The invention is not the best known technology.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (4)
1. The utility model provides a series connection thin wall pipe energy-absorbing system of all-round auto-lock in space which characterized in that: each series thin-walled tube substructure is formed by connecting four long-strip elliptical tubes and three groups of parallel thin plates in series, a plurality of series thin-walled tube substructures are arranged in a staggered mode in a mode that the series thin-walled tubes move forward and backward and adjacent thin-walled tubes are spaced at equal intervals, so that the expansion of the system in the Y-axis direction is realized, the second layer is expanded along the X-axis in the same arrangement mode and is vertically lapped on the first layer to complete the lapping of a group of series thin-walled tubes, a plurality of groups of series thin-walled tubes are stacked in a staggered mode to realize the longitudinal expansion of the energy absorption system in the Z-axis direction, and the rest layers form a multi-row and multi-column combined structure in a jogged mode, so that the combined thin-walled tube structure can achieve the self-locking effect of adjacent structural members in the space omnibearing impact process;
the thin-wall tube substructure is characterized in that the cross section of the thin-wall tube substructure is formed by connecting four long oval tubes with the same size in series with parallel thin plates at equal intervals, and the width H of each parallel thin plate and the width N of a main tube meet the condition that H is equal to N;
the length W and the width N of the main body of the thin-wall tube substructure meet the condition that W is 3N;
the fillet radius R of the thin-wall pipe substructure and the width N of the main pipe meet the condition that R is 2N;
the axial length L of the thin-wall pipe substructure and the width N of the main body pipe meet the condition that L is equal to N.
2. The spatial omni-directional self-locking series thin-walled tube energy absorption system according to claim 1, characterized in that: in an X-Y axis plane, a plurality of series thin-wall pipe sub-structures are arranged in a staggered mode in a forward and backward mode, the front and back staggered distance of the end heads of two adjacent thin-wall pipes is the width of a parallel thin plate and the axial length of a main body pipe, namely the staggered distance is H + L, the spacing distance of two adjacent thin-wall pipes is the width N of the main body pipe, the thin-wall pipe sub-structures in the Z axis direction are stacked into a group by the upper layer and the lower layer in a criss-cross mode, and a three-dimensional space three-dimensional structure is formed by the embedding mode that a plurality of groups of thin-wall pipes are stacked in a staggered mode, so that the combined structure can be rapidly expanded in the three-dimensional direction and is not limited by the size of the thin-wall pipe sub-structures.
3. The spatial omni-directional self-locking series thin-walled tube energy absorption system according to claim 1, characterized in that: the number of the series thin-wall tubes expanded in the X-Y axis plane is not less than 2n, n is not less than 2, and the number of groups expanded in the Z axis is not less than 2.
4. The spatial omni-directional self-locking series thin-walled tube energy absorption system according to claim 1, characterized in that: the energy absorption system is made of a metal thin-wall tube structure.
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| CN202210206979.2A CN114412959A (en) | 2022-03-04 | 2022-03-04 | Spatial omnibearing self-locking series thin-walled tube energy absorption system |
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| CN202210206979.2A CN114412959A (en) | 2022-03-04 | 2022-03-04 | Spatial omnibearing self-locking series thin-walled tube energy absorption system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR870000207Y1 (en) * | 1984-06-08 | 1987-02-10 | 이상춘 | Bumper |
| EP1426289A1 (en) * | 2002-12-04 | 2004-06-09 | Kawasaki Jukogyo Kabushiki Kaisha | Impact resistant structure for the helicopter and energy absorber used for the same |
| CN110015255A (en) * | 2019-04-28 | 2019-07-16 | 上海理工大学 | A kind of energy-absorption box and bumper of star-like Cellular structure |
| CN215890931U (en) * | 2021-10-20 | 2022-02-22 | 西南石油大学 | Self-locking thin-wall tube structure energy absorption system with negative Poisson ratio effect |
| CN217355385U (en) * | 2022-03-04 | 2022-09-02 | 西南石油大学 | Spatial omnibearing self-locking series thin-walled tube energy absorption system |
-
2022
- 2022-03-04 CN CN202210206979.2A patent/CN114412959A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR870000207Y1 (en) * | 1984-06-08 | 1987-02-10 | 이상춘 | Bumper |
| EP1426289A1 (en) * | 2002-12-04 | 2004-06-09 | Kawasaki Jukogyo Kabushiki Kaisha | Impact resistant structure for the helicopter and energy absorber used for the same |
| CN110015255A (en) * | 2019-04-28 | 2019-07-16 | 上海理工大学 | A kind of energy-absorption box and bumper of star-like Cellular structure |
| CN215890931U (en) * | 2021-10-20 | 2022-02-22 | 西南石油大学 | Self-locking thin-wall tube structure energy absorption system with negative Poisson ratio effect |
| CN217355385U (en) * | 2022-03-04 | 2022-09-02 | 西南石油大学 | Spatial omnibearing self-locking series thin-walled tube energy absorption system |
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